完整的运算过程可以写出来吗

阅读程序，写出运行结果。

#include

using namespace std;

int sub( int, int );

int a = 1;

int main()

{ int m = 1, n = 2, f;

f = sub( m, n );

cout << a << '\t' << f << endl;

f = sub( m, n );

cout << a << '\t' << f << endl;

}

int sub( int c, int d )

{ static int m = 2, n = 5;

cout << m << '\t' << n << '\t' << endl;

a = ++a; c = m++; d = n++;

return c + d;

}